How do I use 3dmark to benchmark games?

I've been trying to find a program that I can use to calculate fps or in some of my games. People have told me that I can do it with 3D mark which I have but I can't figure out how to get it to work. Any help?

Yeah 3Dmark scores your gaming performance through various tests. If you want to test your FPS in games, look online for the command. For example in battlefield 1942, Press ~ , then at the command window type in "console.showfps.1"